Back now at 7:42. "Gma" investigates this morning. This is a problem for many of us. How to protect your smartphone from water and shattering. Gio Benitez putting a couple of the most popular protective cases to the test. Completely shattered. Reporter: You just spent 200 bucks on a new phone. One of about 1 billion sold every year. And you trashed it. You are not alone. Turns out, there are a slew of products out there promising to keep them safe. I'm going to try to bake this phone. Reporter: And a slew of people online. There it is. Reporter: Pushing them to the limits. Let's go ahead and do it. To find ways to protect your phone. "Gma" investigates got on the case and tried out one of the more durable brands, the otter box. The company says this $90 waterproof case will survive in water up to 30 minutes. This is the otter box preserver. I'm going to trust my iPhone with it to put it to the test. We're going to put up against this, a $10 jell case sold everywhere. Test number one, the spill test. Everything seems to be working on both phones. They both survived the spill test. Test two, the dunk test. Here I go. They sat there for five seconds. And remember, the jell case never promised to be waterproof. The otter box worked. The jell case, not so much. We took the case outside. The otter box promises to protect from falls up to 6'6". The otter box is fine. And the jell case, fine, too. Next, we go beyond another otter box's claims. The ultimate cell phone nightmare, driving over your phone. Wow. It looks like it's okay. But get a load of this. The 10 buck case -- No way. It survived. In fact, we were so surprised by the jell case, we tossed it around, and still, nothing is wrong. But before you think it's the phone that is indestructible, we took all cases off done. It shattered. Oh. When you're buying these cases, it's a good idea to get the kind that are both rubber and plastic. And make sure that the edge of the case is higher than that screen. That way, the screen will be protected when it hits the ground. That's great advice. Amy has a question because her phone was melting because she looked something up on her phone. I don't know if we have that. I think it melted because it was in gio's hand. There he is. Number 28. The ladies have him on speed dial. Very serious in that photo, gio. Gio answers to the name, 28. He said, call his team.

This transcript has been automatically generated and may not be 100% accurate.

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